This would make a torrent that's a 100MB or so, but would compress really well over gzip Content-Encoding.

Here is a testcase for a 64bit system, note that because of another bug in tr_loadFile you can't open very large torrents with transmission-cli (they get truncated), but you can just pass a http link to it instead:

MikroTik RouterOS is prone to a buffer-overflow vulnerability because it fails to properly bounds-check user-supplied data before copying it into an insufficiently sized buffer.Attackers can exploit this issue to execute arbitrary code in the context of the affected application. Failed exploit attempts will result in denial-of-service conditions.Versions prior to RouterOS 6.41.3 and 6.42rc27 are vulnerable.